Neuroscientists,having amassed a wealth of knowledge over the past twenty years about the brainand its development from birth to adulthood, are now drawingsolid conclusions about how the human brain grows and how babies acquirelanguage. (A) Neuroscientists,having amassed a wealth of knowledge over the past twenty years about the brainand its development from birth to adulthood, are
(D) Neuroscientistshave amassed a wealth of knowledge over the past twenty years about the brainand its development from birth to adulthood,
D这里OG给的解释说have amassed和now drawing不能fit
现在完成时表示动作发生在过去,或者是一个持续的影响或者是一个持续动作 和now drawing 为什么不能fit?
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